CN110565452A - Railway roadbed body steel flower tube grouting reinforcement method and railway roadbed - Google Patents
Railway roadbed body steel flower tube grouting reinforcement method and railway roadbed Download PDFInfo
- Publication number
- CN110565452A CN110565452A CN201910870712.1A CN201910870712A CN110565452A CN 110565452 A CN110565452 A CN 110565452A CN 201910870712 A CN201910870712 A CN 201910870712A CN 110565452 A CN110565452 A CN 110565452A
- Authority
- CN
- China
- Prior art keywords
- steel
- railway roadbed
- grouting
- steel floral
- floral tubes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 243
- 239000010959 steel Substances 0.000 title claims abstract description 243
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000002787 reinforcement Effects 0.000 title abstract description 15
- 239000011440 grout Substances 0.000 claims abstract description 39
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 21
- 239000002002 slurry Substances 0.000 claims description 70
- 239000004568 cement Substances 0.000 claims description 10
- 238000005553 drilling Methods 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 229920005646 polycarboxylate Polymers 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 235000019353 potassium silicate Nutrition 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 14
- 238000012544 monitoring process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011257 shell material Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000007569 slipcasting Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Architecture (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
the invention provides a railway roadbed body steel perforated pipe grouting reinforcement method and a railway roadbed, wherein the reinforcement method comprises the following steps: determining the position of the railway roadbed body needing grouting; placing the steel perforated pipe into a position needing grouting, wherein the steel perforated pipe comprises a first steel perforated pipe and a second steel perforated pipe, and the first steel perforated pipe is inserted from the side slope and/or the road shoulder of the railway roadbed body towards the bottom of the railway roadbed body in an inclined mode; the second steel floral tube is arranged in the railway road basic body along the vertical direction and is positioned on one side of the first steel floral tube, which is far away from the central line of the railway road basic body; and grouting the steel flower pipes, namely firstly injecting first grout into the second steel flower pipe to form a grouting curtain, and then injecting the first grout into the first steel flower pipe. The reinforcing method adopts a steel floral tube grouting mode, has small disturbance to the railway roadbed body, is simple in construction method and has good reinforcing effect; and an outer side grouting curtain is formed to prevent the first grout from diffusing to the outside of the railway roadbed body, so that the reinforcing effect of the railway roadbed is effectively controlled.
Description
Technical Field
The invention relates to the technical field of railway roadbed body reinforcement, in particular to a steel flower tube grouting reinforcement method for a railway roadbed body and a railway roadbed.
Background
The operation railway roadbed body, particularly the roadbed body with poor filler gradation, can generate accumulated deformation under the action of dynamic and static loads of a train under the influence of multiple factors such as geological conditions, external climate environment change, construction process management and the like; under the influence of complex weather conditions such as long-term rainfall, fine particles in the roadbed body run off through the pores, the compactness of the roadbed body is reduced, and the uneven settlement of the roadbed body is aggravated. When the train passes through at a high speed, the train can be damaged on the one hand, the abrasion of the train is accelerated, on the other hand, the train can jump, the train shaking is easily caused, the sinking of a bed, the derailment of the train and the like can be caused in serious conditions, and the driving safety is threatened.
When the settlement of the operation railway is regulated, the speed of the train is generally required to be limited but the train cannot be stopped, so that the regulation measures which need to be taken cannot invade the operation railway, the normal operation of the railway cannot be influenced by the settlement and the lateral deformation, and the settlement and the lateral deformation must be finished in a skylight point of the railway at night. At present, the reinforcement of the road filling foundation body of the operation railway is generally solved by adopting a sleeve valve pipe grouting scheme, namely, firstly, holes are formed, sleeve shell materials are poured, sleeve valve pipes and core pipes are inserted into the sleeve shell materials, and segmented grouting is carried out after the sleeve shell materials reach certain strength, so that the effects of reinforcing the road foundation body and preventing settlement from further increasing can be achieved. The scheme has the advantages that the sectional and multiple fixed-point grouting can be realized; the method has the defects that the construction steps are multiple and complex, the construction equipment is large, the railway basic body is disturbed more, particularly in the pneumatic pore-forming process, the pore-forming diameter of a drilled hole is larger, the disturbance on the filler of the road basic body is large during construction, particularly the disturbance on the filler with larger particle size is large, the settlement deformation generated on the road basic body is not easy to control, the settlement of the road basic body is easy to exceed the limit, and the skylight point is difficult to recover, so that the normal operation of the railway is influenced. Therefore, the research on the construction method and the structure for reinforcing the basic body of the filled road has great significance.
Disclosure of Invention
The invention aims to provide a railway roadbed body steel perforated pipe grouting reinforcement method and a railway roadbed, and aims to solve the technical problems that a reinforcement method in the prior art has large disturbance on a railway roadbed body and is complex in construction.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
The invention provides a method for reinforcing a steel floral tube of a railway roadbed body by grouting, which comprises the following steps: determining the position of the railway roadbed body needing grouting; placing steel floral tubes into positions needing grouting, wherein the steel floral tubes comprise first steel floral tubes and second steel floral tubes, and the first steel floral tubes are inserted from the side slopes and/or road shoulders of the railway roadbed body towards the bottom of the railway roadbed body in an inclined mode; the second steel floral tubes are arranged in the railway roadbed basic body along the vertical direction, and the second steel floral tubes are positioned on one side, away from the central line of the railway roadbed basic body, of the first steel floral tubes; and grouting into the steel flower pipe, wherein first grout is injected into the second steel flower pipe to form a grouting curtain, and then the first grout is injected into the first steel flower pipe.
Further, the first slurry comprises a mixed solution obtained by doping a polycarboxylate water reducing agent into cement slurry.
Further, before the step of injecting the slurry into the steel perforated pipe, filling grooves surrounding the pipe orifices are respectively formed on the periphery sides of the pipe orifices of the steel perforated pipe, and second slurry is injected into the filling grooves to close the filling grooves.
further, the second slurry comprises a mixed solution consisting of cement slurry, crude fibers and water glass; and/or the depth of the filling groove is greater than or equal to 2 meters.
Furthermore, the steel perforated pipe comprises a plurality of rows of slurry overflow holes and a protection net, wherein each row of slurry overflow holes are arranged along the length direction of the steel perforated pipe, and the protection net is arranged at the slurry overflow holes.
Further, the step of placing the steel perforated pipe into a position needing grouting specifically comprises the following steps: directly tamping the steel perforated pipe into the railway roadbed body; or drilling grouting holes at positions needing grouting on the railway roadbed body, and tamping the steel perforated pipes into the grouting holes, wherein the hole diameter of the grouting holes is smaller than or equal to the outer diameter of the steel perforated pipes.
Further, the step of injecting the first slurry into the first steel flower tube specifically comprises: and injecting the first slurry into the first steel flower pipes in sequence from the outer side of the railway roadbed body to the central line direction of the railway roadbed body.
According to the second aspect of the invention, a railway roadbed is also provided, which comprises a railway roadbed body, steel floral tubes and a first grouting body, wherein the steel floral tubes comprise first steel floral tubes and second steel floral tubes, the first steel floral tubes are inserted from the side slope and/or the road shoulder of the railway roadbed body towards the bottom of the railway roadbed body in an inclined mode, the second steel floral tubes are arranged in the railway roadbed base body in the vertical direction, and the second steel floral tubes are positioned on one side, away from the central line of the railway roadbed body, of the first steel floral tubes; the first grouting body is formed by injecting first grout into the steel floral tubes, and the second steel floral tubes and the first grouting bodies corresponding to the second steel floral tubes form grouting curtains in the railway roadbed body.
Furthermore, the outer diameter of the steel perforated pipe is 38 mm-45 mm, and the wall thickness is 2 mm-4 mm.
Further, the railway roadbed comprises a second grouting body, and the second grouting body is coated on the periphery side of the pipe orifice of the steel floral tube.
Furthermore, the first steel floral tubes and the second steel floral tubes are uniformly distributed on two opposite sides of the railway roadbed body along the central line, the first steel floral tubes are staggered in the railway roadbed body to form a net shape, and an included angle between the first steel floral tubes and a plane where the bottom of the railway roadbed body is located is 25-45 degrees.
The invention provides a method for reinforcing a steel floral tube of a railway roadbed body by grouting, which is characterized in that a first steel floral tube is obliquely inserted from a side slope and/or a road shoulder of the railway roadbed body, a second steel floral tube is arranged in the same row or on the outer side of the first steel floral tube far away from the central line direction of the railway roadbed body, and the second steel floral tube is arranged along the vertical direction to form an outer grouting curtain, so that the first grout is prevented from diffusing to the outside of the railway roadbed body, and the reinforcing effect of the railway roadbed body is effectively controlled. The grouting reinforcement method adopts a steel floral tube grouting mode, has small disturbance on the railway roadbed body, and is simple in construction method and good in reinforcement effect.
Drawings
Fig. 1 is a construction flow chart of a method for grouting and reinforcing steel floral tubes of a railway roadbed body according to an embodiment of the invention;
Fig. 2 is a schematic structural diagram of a steel flower pipe in a railway roadbed according to an embodiment of the invention;
Fig. 3 is a schematic cross-sectional view of a railroad bed provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic plan view of the railroad bed shown in FIG. 3;
Fig. 5 is a schematic cross-sectional view of a railroad bed provided in accordance with another embodiment of the present invention;
Fig. 6 is a schematic plan view of the railway roadbed shown in fig. 5.
Description of reference numerals:
10. A steel floral tube; 11. a first steel floral tube; 12. a second steel perforated pipe; 13. a slurry overflow hole; 14. a conical tube head; 20. a railroad bed body; 30. a road shoulder; 40. side slope; 50. a toe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. In the description of the present invention, the relevant orientation or positional relationship is based on the orientation or positional relationship shown in fig. 3, where "up" and "down" refer to the up-down direction of fig. 3. It is to be understood that such directional terms are merely used to facilitate describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must be constructed and operated in a particular orientation and therefore should not be considered as limiting the invention.
In addition, the descriptions of "first", "second", etc. in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number or order of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Referring to fig. 1, in a first aspect of the embodiments of the present invention, there is provided a method for reinforcing a railway roadbed body by grouting steel perforated pipes, including the following steps: s1, determining the position of the railway roadbed body 20 needing grouting; s2, placing the steel floral tube 10 at a position needing grouting, wherein the steel floral tube 10 comprises a first steel floral tube 11 and a second steel floral tube 12, and the first steel floral tube 11 is inserted from the side slope 40 and/or the road shoulder 30 of the railway roadbed body 20 towards the bottom of the railway roadbed body 20 in an inclined mode; the second steel floral tube 12 is arranged in the railway roadbed body 20 along the vertical direction, and the second steel floral tube 12 is positioned on one side of the first steel floral tube 11 far away from the central line of the railway roadbed body 20, as shown in fig. 3; and S3, grouting into the steel flower pipe 10, wherein first grouting liquid is injected into the second steel flower pipe 12 to form a grouting curtain, and then the first grouting liquid is injected into the first steel flower pipe 11.
according to the method for reinforcing the steel floral tubes of the railway roadbed body, provided by the embodiment of the invention, the first steel floral tubes 11 are obliquely inserted from the side slope 40 and/or the road shoulder 30 of the railway roadbed body 20, the second steel floral tubes 12 are arranged in the same row or on the outer side of the first steel floral tubes 11 far away from the central line direction of the railway roadbed body 20, and the second steel floral tubes 12 are arranged in the vertical direction to form an outer side grouting curtain, so that the first grout is prevented from being diffused to the outer part of the railway roadbed body 20, and the reinforcing effect of the railway roadbed body 20 is effectively controlled. The grouting reinforcement method adopts a steel floral tube grouting mode, has small disturbance on the railway roadbed body 20, and is simple in construction method and good in reinforcement effect.
Specifically, the railway roadbed 20 is monitored, the position of the railway roadbed 20, which needs grouting, is judged, grouting hole sites are designed at the position, which needs grouting, and the grouting hole sites in adjacent rows are arranged in a staggered manner according to a quincunx pattern. The grouting hole sites may be located on the shoulders 30 and/or the slopes 40 of the railroad bed body 20. Marking at the grouting hole position. The first steel perforated pipes 11 are placed into the railway roadbed body 20 from the grouting holes and are staggered to form a net shape. When the first steel floral tube 11 is placed in the railroad bed body 20, the first steel floral tube 11 extends in the direction of the center line of the railroad bed body 20. The first steel floral tubes 11 in each row are uniformly distributed in the railroad bed body 20.
Referring to fig. 3 to 6, the second steel floral tubes 12 are placed in the railroad bed body 20 at the same row or outside of the first steel floral tubes 11 away from the centerline of the railroad bed body 20, that is, the position of the nozzles of the second steel floral tubes 12 on the side slope 40 is located at the same row or below the position of the nozzles of the first steel floral tubes 11 on the side slope 40, and is closer to the toe 50 than the first steel floral tubes 11. The first steel floral tubes 11 are arranged in order from the outside of the railroad bed body 20 toward the direction of the center line thereof. The first steel floral tube 11 at the outermost side of the railway roadbed body 20 is provided with a second steel floral tube 12 at the same row or at the side far away from the central line of the railway roadbed body 20. The second steel floral tube 12 and a grouting curtain formed by injecting the first grout into the second steel floral tube 12 are positioned on one side of the first steel floral tube 11 far away from the center line of the railway roadbed body 20. During grouting, firstly, grouting is performed into the second steel floral tubes 12, namely grouting curtains or barriers can be formed at the outer sides and the bottoms of the railway roadbed bodies 20, so that the first grout injected into the first steel floral tubes 11 is prevented from flowing to the outside of the railway roadbed bodies 20.
In some embodiments, referring to FIG. 2, the first and second steel flower tubes 11 and 12 have an outer diameter of 38mm to 45mm, respectively, and a wall thickness of 2mm to 4mm, respectively. In this embodiment, the first steel flower tube 11 and the second steel flower tube 12 preferably have the dimensions of 42mm in outer diameter and 3mm in wall thickness. The front ends of the first steel perforated pipe 11 and the second steel perforated pipe 12, namely, the end which firstly enters the railway roadbed body 20, are welded with the conical pipe head 14, and the length of each steel perforated pipe can be processed into 2-6 m according to the actual situation on site.
in some embodiments, the first and second steel flower tubes 11 and 12 respectively include a plurality of rows of grout holes 13 and a protective mesh, each row of grout holes 13 is disposed along the length direction of the first or second steel flower tube 11 or 12, and the protective mesh is installed at the grout holes 13. The slurry overflow hole 13 is a through hole arranged on the pipe wall of the first steel perforated pipe 11 and the second steel perforated pipe 12, a protection net is arranged on the slurry overflow hole 13, the first steel perforated pipe 11 and the second steel perforated pipe 12 are prevented from being installed in the process that dregs with large particles enter the pipe, meanwhile, the first slurry in the pipe can be smoothly overflowed, and the first slurry is diffused to enter the railway roadbed body 20. It is understood that the protection net can be installed inside the grout outlet 13, or can be installed outside the grout outlet 13, where the outside of the grout outlet 13 includes the outer wall of the steel flower tube and the inner wall of the steel flower tube, i.e. the protection net can be installed on the outer wall and/or the inner wall of the steel flower tube at the grout outlet 13. The mounting means may be welding.
Specifically, 4 rows of grout overflow holes 13 are distributed on the steel perforated pipe with the outer diameter of 42mm and the wall thickness of 3mm, and the 4 rows of grout overflow holes 13 are uniformly distributed on the pipe wall of the steel perforated pipe along the peripheral side of the steel perforated pipe. The distance between the pulp overflow holes 13 in the same row is 40cm, the adjacent two rows of pulp overflow holes 13 are arranged in a quincunx staggered manner, and the aperture of each pulp overflow hole 13 is 6 mm.
In some embodiments, the step of placing the steel floral tube 10 into the position to be grouted in step S2 specifically includes: directly tamping the steel perforated pipe 10 into the railway roadbed body 20; or drilling grouting holes at positions needing grouting on the railway roadbed body 20, and then tamping the steel perforated pipes 10 into the grouting holes, wherein the hole diameter of the grouting holes is smaller than or equal to the outer diameter of the steel perforated pipes 10. When the grouting method is adopted for grouting, grouting holes do not need to be formed in advance or the hole diameters of the grouting holes do not need to be small, so that the disturbance on the railway roadbed body 20 is small, and the construction method is simple.
Specifically, there are two methods for placing the first steel perforated pipe 11 or the second steel perforated pipe 12 into the railroad bed body 20, one is to ram the first steel perforated pipe 11 or the second steel perforated pipe 12 into the railroad bed body 20 with a TY-28 type pneumatic pick; if it is difficult or inefficient to directly ram the railroad bed body 20, another method may be to use ZQS-50 hand-held drilling machine with small disturbance to the ground, portability and easy movement to drive the twist drill rod to form holes with diameters corresponding to the diameters of the first or second steel flower tubes 11 and 12, respectively. And when the drilling machine passes through the gravel layer, the drilling rod is withdrawn, and then the TY-28 type pneumatic pick is adopted to be tamped into the railway roadbed body 20.
In some embodiments, before the step of injecting the first slurry into the first steel flower pipe 11 and the second steel flower pipe 12, respectively, a filling groove surrounding the nozzle is formed around the nozzle of the first steel flower pipe 11 and the second steel flower pipe 12, respectively, and the second slurry is injected into the filling groove to close the filling groove. It can be understood that the second slurry is injected into the filling groove, and the steel floral tube can be shaken in a small amplitude, and the operation is repeated for several times until the second slurry does not continuously seep, so that the second slurry can be filled between the filling groove and the wall of the steel floral tube 10, and the purpose is to form a closed grouting space to prevent the first slurry from running off to the outside of the railway roadbed body 20 along the wall of the steel floral tube after overflowing the slurry overflow hole 13. Wherein the depth of the filling groove is greater than or equal to 2 m. Further, the second slurry comprises a mixed liquid composed of cement slurry, crude fibers and water glass. The second slurry is easier to solidify than the first slurry, and the first slurry cannot flow out of the solidified second slurry, so that the first slurry overflowing from the slurry overflow holes 13 can be effectively prevented from diffusing to the outside of the railway roadbed body 20 along the wall of the steel flower tube, and the first slurry can be diffused into the railway roadbed body 20 to reinforce the roadbed body. After the steel flower pipe 10 is placed in the railroad bed body 20 and the filling groove around the pipe opening of the steel flower pipe 10 is closed with the second slurry, the first slurry can be injected into the second steel flower pipe 12 and the first steel flower pipe 11.
In some embodiments, referring to fig. 3 to 6, the step of injecting the first slurry into the first steel perforated pipe 11 specifically includes: the first slurry is injected into the first steel floral tube 11 in sequence from the outside of the railroad bed body 20 to the center line direction of the railroad bed body 20. Specifically, a grouting joint is welded to the first steel floral tube 11, and a grouting pipeline is connected with the grouting joint for grouting. The process of injecting the first slurry is full-hole one-time grouting, and grouting is controlled to be finished according to grouting pressure and monitoring data. That is, the entire construction sequence of injecting the first slurry is to construct the first steel pipe 11 at the lowermost row of the toe 50, that is, to construct the first steel pipe 11 at the outermost side of the railroad bed body 20, and then to construct the first steel pipes 11 in each row in sequence from the outer side of the railroad bed body 20 to the central line direction thereof. In this embodiment, the construction sequence of grouting into the first steel floral tube 11 is sequentially grouting from the outside to the inside of the railroad bed body 20, so as to ensure that the first grout continuously reinforces the railroad bed body 20 from the outside to the inside, and enhance the reinforcing effect.
Further, the first slurry injected into the first steel flower pipe 11 and the second steel flower pipe 12 includes a mixed solution obtained by mixing a polycarboxylate water reducing agent into cement slurry. Specifically, the cement slurry is prepared from P.042.5 ordinary portland cement according to a water cement ratio of 0.6: 1, and 1% of polycarboxylate water reducing agent (the polycarboxylate water reducing agent of the embodiment is KDSP-1) is doped into the cement slurry to obtain a mixed solution, namely the first slurry. The pressure of the injected first slurry is determined by tests, and the pressure of the slurry injected on the slope 40 is generally not more than 0.5MPa, and the pressure of the slurry injected on the road shoulder 30 is not more than 0.2 MPa. And when the grouting pressure exceeds the limit value, the slurry suction amount is less than 2.5L/min, the stabilization time is more than 5min, or the deformation monitoring reaches a safety alarm value, stopping grouting.
The concrete construction steps of the method for reinforcing the steel perforated pipe of the railway roadbed body by grouting provided by the embodiment of the invention are as follows:
1. And marking the position to be grouted according to the monitoring result and the design requirement of the railway roadbed body 20, and retesting, wherein the deviation of the hole site is not more than 10 cm. And arranging grouting hole positions on the positions needing grouting according to the quincunx staggered arrangement, measuring and setting out, and marking.
2. a first steel floral tube 11 and a second steel floral tube 12 are manufactured. 4 rows of slurry overflow holes 13 are distributed on a steel perforated pipe 10 with the outer diameter of 42mm and the wall thickness of 3mm, the included angle between the 4 rows of slurry overflow holes 13 is 90 degrees, the distance between the slurry overflow holes 13 in the same row is 40cm, two adjacent rows of slurry overflow holes 13 are arranged in a quincunx staggered mode, and the aperture of each slurry overflow hole 13 is 6 mm. A conical pipe head 14 is welded at the foremost end of the steel perforated pipe 10, and meanwhile, in order to prevent dregs from entering the steel perforated pipe 10 in the installation process, a fine protection net is welded on slurry overflow holes 13 of the steel perforated pipe 10, so that common rock and soil particles cannot enter the fine protection net, and slurry can smoothly overflow. The steel perforated pipes 10 are connected by welding through steel sleeves, and the length of each section of steel perforated pipe 10 can be processed into 2-6 m according to the actual situation on site.
3. The first steel flower tube 11 and the second steel flower tube 12 are directly rammed or tapped. If the stratum conditions are better, the first steel perforated pipe 11 or the second steel perforated pipe 12 is tamped into the railway roadbed body 20 by a TY-28 type pneumatic pick; if the railway roadbed body 20 is difficult to directly tamp or the work efficiency is low, an ZQS-50 handheld drilling machine which is light and easy to move and has small disturbance on the stratum can be used for driving a twist drill rod to form holes, and the diameters of the formed holes correspond to the diameters of the first steel flower pipe 11 or the second steel flower pipe 12 respectively. And when the drilling machine passes through the gravel layer, the drilling rod is withdrawn, and then the TY-28 type pneumatic pick is adopted to be tamped into the railway roadbed body 20. Wherein, the first steel floral tube 11 is obliquely inserted into the bottom of the railroad bed body 20 from the side slope 40 and/or the road shoulder 30 of the railroad bed body 20, and the second steel floral tube 12 is vertically inserted into the railroad bed body 20 from the side slope 40 downwards.
4. And (7) sealing. And digging filling grooves with the depth of not less than 2m on the periphery sides of the pipe orifices of the first steel perforated pipe 11 and the second steel perforated pipe 12, pouring second slurry obtained by mixing cement slurry, coarse fibers and water glass into the filling grooves, and slightly vibrating the steel perforated pipe 10 by using a small hammer to fill the filling grooves with the second slurry for several times until the second slurry does not seep downwards any more.
5. And (6) grouting. And (3) welding grouting joints on the first steel perforated pipe 11 and the second steel perforated pipe 12, connecting the grouting joints with a grouting pipeline, and performing full-hole one-time grouting. The pressure of the injected first slurry is determined by tests, and the pressure of the slurry injected on the slope 40 is generally not more than 0.5MPa, and the pressure of the slurry injected on the road shoulder 30 is not more than 0.2 MPa. And when the grouting pressure exceeds the limit value, the slurry suction amount is less than 2.5L/min, the stabilization time is more than 5min, or the deformation monitoring reaches a safety alarm value, stopping grouting.
6. And (5) recovering the roadbed body. And after the first slurry is injected, cutting off the steel floral tubes exposed out of the ground, and recovering the vegetation of the side slope 40.
In the steps 3 and 5, three-in-one monitoring means such as automatic monitoring, manual electronic leveling, rail inspection trolley and rail ruler detection are adopted to ensure that the rise value or the settlement value of the railway roadbed body 20 is within a safe range.
in a second aspect of the embodiments of the present invention, there is provided a railroad bed, referring to fig. 3 to 6, the railroad bed including a railroad bed body 20, a steel floral tube 10, and a first grout, the steel floral tube 10 including a first steel floral tube 11 and a second steel floral tube 12, the first steel floral tube 11 being inserted toward the bottom of the railroad bed body 20 by inclining a side slope 40 and/or a road shoulder 30 of the railroad bed body 20, the second steel floral tube 12 being arranged in the railroad bed body 20 in a vertical direction, the second steel floral tube 12 being located on a side of the first steel floral tube 11 away from a center line of the railroad bed body 20; the first grout is formed by injecting the first grout into the steel floral tube 10, and the second steel floral tube 12 and the first grout corresponding to the second steel floral tube 12 form a grouting curtain in the railroad bed body 20.
above-mentioned reinforced railway roadbed of steel floral tube slip casting reinforced structure, including being located the outside and keeping away from the second steel floral tube 12 of central line one side of railway roadbed body 20 promptly, the first slip casting that corresponds with second steel floral tube 12, and second steel floral tube 12 is vertical arranges in railway roadbed body 20, form one protective screen in the railway roadbed body 20 outside and bottom, structural integrity is strong, prevent that first thick liquid from flowing scurring to slope 40 and first thick liquid runs off to railway roadbed body 20's outside promptly, consolidate railway roadbed body 20 more effectively.
In some embodiments, the railroad bed further includes a second grout, and the second grout is coated on the outer circumferential side of the nozzle of the steel floral tube 10. The second slurry is formed by injecting the second slurry into the filling grooves on the outer peripheral sides of the pipe orifices of the first steel flower pipe 11 and the second steel flower pipe 12. The second grout prevents the first grout from overflowing the grout holes 13 and then flowing out of the railway roadbed body 20 along the wall of the steel floral tube when being injected. The railway roadbed forms the net-shaped reinforced structure arranged inside the railway roadbed body 20, the reinforced effect of the steel perforated pipes 10 makes up the deficiency of grouting reinforcement, and the reliability of the reinforcement effect is enhanced. Further, a first steel floral tube 11 and a second steel floral tube 12 are uniformly arranged on two opposite sides of the railway roadbed body 20 along the center line, the first steel floral tubes 11 are staggered in the railway roadbed body 20 to form a net shape, and an included angle between the first steel floral tubes 11 and a plane where the bottom of the railway roadbed body 20 is located is 30-40 degrees. That is, the first steel floral tubes 11 are staggered in the railroad bed body 20, and the reinforcing effect on the railroad bed body 20 is stronger.
the above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention, and all such changes or substitutions are included in the scope of the present invention. Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (11)
1. A method for reinforcing a steel perforated pipe of a railway roadbed body by grouting is characterized by comprising the following steps:
Determining the position of the railway roadbed body needing grouting;
Placing steel floral tubes into positions needing grouting, wherein the steel floral tubes comprise first steel floral tubes and second steel floral tubes, and the first steel floral tubes are inserted from the side slopes and/or road shoulders of the railway roadbed body towards the bottom of the railway roadbed body in an inclined mode; the second steel floral tubes are arranged in the railway roadbed basic body along the vertical direction, and the second steel floral tubes are positioned on one side, away from the central line of the railway roadbed basic body, of the first steel floral tubes;
And grouting into the steel flower pipe, wherein first grout is injected into the second steel flower pipe to form a grouting curtain, and then the first grout is injected into the first steel flower pipe.
2. The method for grouting and reinforcing the steel perforated pipes of the railway roadbed body according to claim 1, wherein the first slurry comprises a mixed solution obtained by mixing a polycarboxylate water reducing agent into cement slurry.
3. The method for grouting and reinforcing a steel floral tube of a railroad bed body according to claim 1, wherein, before the step of grouting the steel floral tube, filling grooves surrounding the mouths of the steel floral tube are respectively formed on the peripheral sides of the mouths of the steel floral tube, and a second grout is injected into the filling grooves to close the filling grooves.
4. The method for reinforcing the steel perforated pipe of the railway roadbed body according to claim 3, wherein the second slurry comprises a mixed solution of cement slurry, crude fiber and water glass; and/or
the depth of the filling groove is greater than or equal to 2 meters.
5. The method for grouting and reinforcing the steel perforated pipes of the railway roadbed body according to any one of claims 1 to 4, wherein the steel perforated pipes comprise a plurality of rows of grout overflow holes and a protective net, each row of the grout overflow holes are arranged along the length direction of the steel perforated pipes, and the protective net is installed at the grout overflow holes.
6. The method for grouting and reinforcing the steel floral tubes of the railway roadbed body according to any one of claims 1 to 4, wherein the step of placing the steel floral tubes into the positions needing grouting specifically comprises the following steps: directly tamping the steel perforated pipe into the railway roadbed body; or drilling grouting holes at positions needing grouting on the railway roadbed body, and tamping the steel perforated pipes into the grouting holes, wherein the hole diameter of the grouting holes is smaller than or equal to the outer diameter of the steel perforated pipes.
7. The method for grouting and reinforcing the steel floral tubes of the railway roadbed body according to any one of claims 1 to 4, wherein the step of injecting the first grout into the first steel floral tubes specifically comprises the following steps: and injecting the first slurry into the first steel flower pipes in sequence from the outer side of the railway roadbed body to the central line direction of the railway roadbed body.
8. a railway roadbed, which is characterized by comprising a railway roadbed body, steel floral tubes and a first grouting body, wherein the steel floral tubes comprise first steel floral tubes and second steel floral tubes, the first steel floral tubes are inserted from the side slope and/or the road shoulder of the railway roadbed body towards the bottom of the railway roadbed body in an inclined mode, the second steel floral tubes are arranged in the railway roadbed body in the vertical direction, and the second steel floral tubes are positioned on one side, away from the central line of the railway roadbed body, of the first steel floral tubes; the first grouting body is formed by injecting first grout into the steel floral tubes, and the second steel floral tubes and the first grouting bodies corresponding to the second steel floral tubes form grouting curtains in the railway roadbed body.
9. The railroad bed of claim 8, wherein the steel floral tube has an outer diameter of 38mm to 45mm and a wall thickness of 2mm to 4 mm.
10. The railroad bed of claim 8, wherein the railroad bed comprises a second grout, and the second grout is coated on the outer circumferential side of the nozzle of the steel floral tube.
11. The railroad bed of claim 8, wherein the first steel floral tubes and the second steel floral tubes are disposed on opposite sides of the railroad bed body along the center line, the first steel floral tubes are staggered and meshed in the railroad bed body, and an included angle between the first steel floral tubes and a plane where the bottom of the railroad bed body is located is 25-45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910870712.1A CN110565452A (en) | 2019-09-16 | 2019-09-16 | Railway roadbed body steel flower tube grouting reinforcement method and railway roadbed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910870712.1A CN110565452A (en) | 2019-09-16 | 2019-09-16 | Railway roadbed body steel flower tube grouting reinforcement method and railway roadbed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110565452A true CN110565452A (en) | 2019-12-13 |
Family
ID=68780369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910870712.1A Pending CN110565452A (en) | 2019-09-16 | 2019-09-16 | Railway roadbed body steel flower tube grouting reinforcement method and railway roadbed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110565452A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111560798A (en) * | 2020-05-29 | 2020-08-21 | 中铁二院工程集团有限责任公司 | Bidirectional adjusting device for deformation of roadbed of ballastless track high-speed railway, using method and construction method |
| CN112252088A (en) * | 2020-10-13 | 2021-01-22 | 中铁四院集团工程建设有限责任公司 | Method for remedying track settlement disease |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886382A (en) * | 2010-06-22 | 2010-11-17 | 中铁第四勘察设计院集团有限公司 | Soft foundation reinforcing method of existing railway or highway subgrade construction |
| CN203821189U (en) * | 2014-03-19 | 2014-09-10 | 中铁西北科学研究院有限公司西南分院 | Through cut sewer drainage antifreezing system based on existing railway operation condition |
| CN104988815A (en) * | 2015-07-03 | 2015-10-21 | 河海大学 | Method for treating post-construction settlement disease of railroad bed |
| JP2015229890A (en) * | 2014-06-06 | 2015-12-21 | 公益財団法人鉄道総合技術研究所 | Reinforcement construction and quality control method for earth structure using injection type natural ground reinforcement material |
| CN106088095A (en) * | 2016-07-26 | 2016-11-09 | 中交第航务工程局有限公司 | Process the injecting grout through steel perforated pipe method of works uneven settlement of foundation |
| CN106522248A (en) * | 2016-11-25 | 2017-03-22 | 重庆市基础工程有限公司 | Method for reinforcing soil slope and slope reinforcing device |
| CN107100215A (en) * | 2017-04-20 | 2017-08-29 | 中国石油集团工程设计有限责任公司北京分公司 | A kind of jacking deviation rectifying method of large-scale storage tank |
| CN207512720U (en) * | 2017-11-16 | 2018-06-19 | 中铁第四勘察设计院集团有限公司 | A kind of structure for handling both wired karst slope type water damages |
| CN110106884A (en) * | 2019-03-26 | 2019-08-09 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of grouting construction method |
| CN211689677U (en) * | 2019-09-16 | 2020-10-16 | 中铁四院集团岩土工程有限责任公司 | Railway roadbed |
-
2019
- 2019-09-16 CN CN201910870712.1A patent/CN110565452A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886382A (en) * | 2010-06-22 | 2010-11-17 | 中铁第四勘察设计院集团有限公司 | Soft foundation reinforcing method of existing railway or highway subgrade construction |
| CN203821189U (en) * | 2014-03-19 | 2014-09-10 | 中铁西北科学研究院有限公司西南分院 | Through cut sewer drainage antifreezing system based on existing railway operation condition |
| JP2015229890A (en) * | 2014-06-06 | 2015-12-21 | 公益財団法人鉄道総合技術研究所 | Reinforcement construction and quality control method for earth structure using injection type natural ground reinforcement material |
| CN104988815A (en) * | 2015-07-03 | 2015-10-21 | 河海大学 | Method for treating post-construction settlement disease of railroad bed |
| CN106088095A (en) * | 2016-07-26 | 2016-11-09 | 中交第航务工程局有限公司 | Process the injecting grout through steel perforated pipe method of works uneven settlement of foundation |
| CN106522248A (en) * | 2016-11-25 | 2017-03-22 | 重庆市基础工程有限公司 | Method for reinforcing soil slope and slope reinforcing device |
| CN107100215A (en) * | 2017-04-20 | 2017-08-29 | 中国石油集团工程设计有限责任公司北京分公司 | A kind of jacking deviation rectifying method of large-scale storage tank |
| CN207512720U (en) * | 2017-11-16 | 2018-06-19 | 中铁第四勘察设计院集团有限公司 | A kind of structure for handling both wired karst slope type water damages |
| CN110106884A (en) * | 2019-03-26 | 2019-08-09 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | A kind of grouting construction method |
| CN211689677U (en) * | 2019-09-16 | 2020-10-16 | 中铁四院集团岩土工程有限责任公司 | Railway roadbed |
Non-Patent Citations (4)
| Title |
|---|
| 任立志等: "《地铁叠线盾构区间隧道下穿高铁轨道群施工关键技术》", 30 June 2018, 中国铁道出版社, pages: 81 - 87 * |
| 周革: "旋喷桩联合花管注浆加固既有普速铁路软基施工应用技术研究", 《铁道标准设计》, vol. 59, no. 11, 6 October 2015 (2015-10-06), pages 40 - 42 * |
| 徐彩风: "旋喷桩联合花管注浆在既有铁路软基处理中的应用", 《资源环境与工程》, vol. 28, no. 02, 25 April 2014 (2014-04-25), pages 164 - 168 * |
| 连杰: "花管注浆加固工程施工工艺及注意事项分析", 《黑龙江科技信息》, no. 15, 25 May 2016 (2016-05-25), pages 216 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111560798A (en) * | 2020-05-29 | 2020-08-21 | 中铁二院工程集团有限责任公司 | Bidirectional adjusting device for deformation of roadbed of ballastless track high-speed railway, using method and construction method |
| CN111560798B (en) * | 2020-05-29 | 2021-12-07 | 中铁二院工程集团有限责任公司 | Bidirectional adjusting device for deformation of roadbed of ballastless track high-speed railway, using method and construction method |
| CN112252088A (en) * | 2020-10-13 | 2021-01-22 | 中铁四院集团工程建设有限责任公司 | Method for remedying track settlement disease |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108678777B (en) | Support method for tunnel fault fracture zone section | |
| CN112554177B (en) | Construction method of ultra-long small-diameter cast-in-situ bored pile | |
| CN102518135B (en) | Horizontal jet grouting soil anchor and castinplace pile Composite Foundation Pit supporting construction engineering method | |
| CN101737060B (en) | Beneath-soil through-tunnel superlarge diameter pipe curtain construction method | |
| CN110359921A (en) | Wear the construction method of building in a kind of shield short distance side | |
| CN103147442B (en) | Ultra-deep foundation pit press-grouting pile and prestressed anchor combined supporting construction method | |
| CN108951612A (en) | A kind of subway tunnel shield end reinforcement means | |
| CN104631470A (en) | Deep foundation pit combination retaining and protecting construction method for geology with high water level and large particle size sand gravel | |
| CN106437726A (en) | Ground fracture crushed zone passing construction method for shallow-buried tunnel excavation | |
| CN109611102A (en) | Construction of the flyover method is worn under a kind of cold excavation | |
| CN105970970A (en) | Pre-stressed anchor cable supporting construction method for near-railway deep foundation pit | |
| CN112593559A (en) | Construction method for deep foundation pit supporting of micro-pile prestressed anchor cable composite soil nailing wall | |
| CN112482347B (en) | Construction method of soft soil treatment reinforcing layer and soft soil treatment reinforcing layer | |
| CN107882040A (en) | A kind of construction method of foundation ditch prestress anchorage cable | |
| CN113431039A (en) | Construction method of bridge implanted pile | |
| CN112593943A (en) | Vertical shaft neck section well wall structure in thick water-containing backfill soil layer and construction method | |
| CN110735436A (en) | cutting rock slope reinforced structure | |
| CN114575355B (en) | Soil protection construction method | |
| CN110565452A (en) | Railway roadbed body steel flower tube grouting reinforcement method and railway roadbed | |
| CN110644461A (en) | Foundation treatment method | |
| CN211689677U (en) | Railway roadbed | |
| CN113404042A (en) | Bridge pile position construction method | |
| CN109736156A (en) | A kind of highway barrier and sound barrier share integrated steel anchor tube foundation structure and construction method | |
| CN110924401A (en) | Construction foundation pit supporting mode for combined arching and bearing of mixing piles and cast-in-place piles | |
| CN115717397A (en) | Larsen steel sheet pile and prestressed anchor cable combined supporting construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 430061 No. 745 Peace Avenue, Yangyuan, Wuchang, Wuhan, Hubei Province Applicant after: China Railway Siyuan Group Engineering Construction Co., Ltd Applicant after: CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. Address before: 430061 No. 745 Peace Avenue, Yangyuan, Wuchang, Wuhan, Hubei Province Applicant before: GEOTECHNICAL ENGINEERING CO., LTD. OF CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. Applicant before: CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP Co.,Ltd. |
|
| CB02 | Change of applicant information |